Safety

Barrier protection is selected for the job at hand, not worn as a fixed uniform. Gloves and a closed, fluid-resistant laboratory coat are the baseline for anything involving blood; face and eye protection are added whenever a tube is uncapped by hand, a syringe is decanted, or a specimen is mixed hard enough to throw droplets. Gloves come off the moment they are torn or soiled, and always before touching clean surfaces such as keyboards, telephones and door handles. Doffing order matters — the most contaminated item is removed first, and hands are cleaned afterwards.

Hygiene is what stops contamination travelling from the bench to your face, your phone and the corridor outside. Hands are cleaned after gloves come off, before leaving the technical area, before eating and after any contact with blood. Alcohol-based rub is fast and effective on hands that look clean, but it does not lift organic soil, so visibly contaminated hands need soap and running water. Food, drink, cosmetics and contact lens handling stay out of the work area, long hair is tied back away from open specimens, and personal items are kept off the bench surface.

Specimens moving between sites are dangerous goods, and the person who packs them carries part of the responsibility for the shipment. Most diagnostic blood samples travel as UN 3373, Biological Substance, Category B, inside a three-layer system: a leakproof primary tube, a leakproof secondary container holding enough absorbent to take up everything inside it, and a rigid outer box bearing the diamond UN 3373 mark and the proper shipping name. Requisitions ride outside the secondary container. Anyone who classifies, packs, marks or signs for a shipment needs current transport training on file under Canada's dangerous goods rules.

Precautions posted on a ward describe how the patient is cared for; they do not change how tightly the tube is wrapped. In the laboratory every specimen is already handled as though it were infectious, so a sample from a patient under contact or droplet precautions is analysed the same way any other is. What genuinely alters risk is aerosol generation: sealed centrifuge buckets are opened only after the rotor has stopped and, where indicated, inside a cabinet; nothing is expelled forcefully from a syringe; spills are disinfected promptly. A bag showing visible leakage is dealt with before the tube inside is opened.

Safety only works when problems get said out loud. A technologist is expected to notice the frayed power cord, the unmarked squeeze bottle, the guard interlock that no longer stops a moving probe, the sharps pail filled past its line — and to act rather than quietly work around it. An immediate hazard is made safe or taken out of service, and the concern then goes to the supervisor and into the written reporting system. Near misses are recorded as seriously as injuries, because they are the cheapest warning a laboratory ever receives.